Top knuckle of articulating arm



FIG. 1 is a front, top, right side perspective view of a top knuckle ofarticulating arm;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a left side elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom perspective view thereof;

FIG. 7 is another right side elevation view thereof shown rotated;

FIG. 8 is a right side perspective view thereof, shown rotated; and,

FIG. 9 is another right side perspective view thereof, shown rotated.

The broken lines illustrating the articulating arm in FIGS. 1-9 areenvironment that form no part of the claimed design, while the remainingbroken lines in FIGS. 1-9 illustrate portions of the top knuckle ofarticulating arm that form no part of the claimed design.

CLAIM The ornamental design for a top knuckle of articulating arm, asshown and described.